Hello,
Having a Mobile Menu at 1200px is Definitely Possible but there is a fair bit of Customization required to achieve this:
In the style.css File, you will need to change all the Media Queries that includes the #header,#primary-menu and other Header Elements from @media (min-width: 992px) to @media (min-width: 1200px) and from @media (max-width: 991.98px) to @media (max-width: 1199.98px).
In the js/functions.js File, you will need to change all the following codes targeting the Headers and Primary Menus:
[ch_pre type="js"]$body.hasClass('device-xl') || $body.hasClass('device-lg')[/ch_pre]
to:
[ch_pre type="js"]$body.hasClass('device-xl')[/ch_pre]
and:
[ch_pre type="js"]$body.hasClass('device-md') || $body.hasClass('device-sm') || $body.hasClass('device-xs')[/ch_pre]
to:
[ch_pre type="js"]$body.hasClass('device-lg') || $body.hasClass('device-md') || $body.hasClass('device-sm') || $body.hasClass('device-xs')[/ch_pre]
This should definitely work fine. We are working on making this much more easier in the coming updates and will send you an email Notification once this is available. Hope this Helps!
Let us know if we can help you with anything else or if you find any further issues.